LABORATORY PROCEDURES 



Salinity Determinations 



The surface salinity samples obtained at 

 each bathythermograph lowering were analyzed 

 on shipboard using a modification of the Knudsen 

 method (Van Landingham, 1957). A comparison 

 of the shipboard and subsequent laboratory 

 determinations showed no significant difference 

 between the two. The salinity data are included 

 in tables 1 to 3. 



KING, JOSEPH E., and THOMAS S. HIDA 



1957. Zooplankton abundance in the cen- 

 tral Pacific, Part II. U.S. Fish 

 and Wildlife Service, Fishery Bulle- 

 tin, vol. 57, no. 118, p. 365-395. 



SHERMAN, KENNETH, and ROBERT P. BROWN 

 1961. Oceanographic and biological data, 

 Hawaiian waters , January - October 

 1959. U.S. Fish and Wildlife Serv- 

 ice. Special Scientific Report-- 

 Fisheries No. 396, 7 1 p. 



Zooplankton 



For all cruises, the methods of deter- 

 mining zooplankton abundance described by King 

 and Hida (1957) and Sherman and Brown (1961) 

 were followed. 



LITERATURE CITED 



CALLAWAY, RICHARD J. 



1957. Oceanographic and meteorological 

 observations in the northeast and 

 central North Pacific, July- 

 December 1956. U.S. Fish and 

 Wildlife Service, Special Scientific 

 Report--Fisheries No. 230, 49 p. 



KING, JOSEPH E. , and JOAN DEMOND 



1953. Zooplankton abundance in the cen- 

 tral Pacific. U.S. Fish and Wild- 

 life Service, Fishery Bulletin, vol. 

 54, no. 82, p. 111-144. 



U.S. NAVY HYDROGRAPHIC OFFICE 



1956. Bathythermograph observations. 

 U.S. Navy Hydrographic Office Pub. 

 606-C, 2nd edition. 16 p. 



U.S. WEATHER BUREAU 



1959. Manual of marine meteorological 

 observations. U.S. Weather Bureau 

 Circular M, 10th ed. , 127 p. 



VAN LANDINGHAM, JOHN W. 



1957. A modification of the Knudsen 

 method for salinity determination. 

 Journal duConseil Permanent 

 International pour l'Exploration de 

 la Mer, vol. 22, no. 2, p. 174-179. 



YAMASHITA, DANIEL T., and KENNETH D. 

 WALDRON 



1958. An all -plastic dart -type fish tag. 

 California Fish and Game, vol. 44, 

 no. 4, p. 311-317. 



